Hi RawCrypto,

First thing you need to know is where to find your wallet.dat file. This is important as this is your actual wallet information, which you use to backup or move your wallet.
It is located here:
C:/Users/User/Appdata/Roaming/Diamond
In the Diamond folder is a series of files and folders. Choose the wallet.dat file and copy it to a USB stick/CD/portable HDD etc. Always keep an up-to-date copy of this file in a secure offline location, in case your computers HDD crashes or your computer otherwise becomes unusable. You should also password protect your wallet, as if someone gets a hold of your wallet.dat file and it is not encrypted, your DMD are theirs.

Download and install the DMD program onto the second computer you intend to use. Allow it to synchronise, then close the program. Open on this computer the same folder, C:/Users/User/Appdata/Roaming/Diamond and copy from the USB etc the wallet.dat file from the first computer that contains your DMD. It will ask if you wish to overwrite, select yes. Your second computer now has your original wallet on it. Run the DMD program and your coins will be there when the program opens.

Regards

chilo